How do I store breast milk at work?

Pump and store milk either in glass or plastic bottles or in plastic milk collection bags. Leave room at the top of each bottle or bag for expansion if you'll be freezing the milk. Label the bottles or bags with your name and the date so you can use the oldest ones first. Store them in the office refrigerator or a cooler while at work. Carry them home in a cooler with an ice pack if your commute is longer than 30 minutes